A local public school board voted to bar a parent from continuing to coach his son’s high school football team. The parent is a former paramedic who apparently contracted HIV infection several years ago while treating an automobile accident victim subsequently discovered to be HIV positive. School board members are concerned that the parent could transmit HIV to players while coaching or rendering first aid to injured players. One board member who is a physician does not think it is a good idea for the parent to continue coaching. Does the school board’s action violate the ADA or Rehabilitation Act?